15 January 2016, 03:52 PM ET
The slashed and punctured bones of a woolly mammoth suggest that humans lived in the far northern reaches of Siberia earlier than scientists had previously thought, a new study finds.
15 January 2016, 03:50 PM ET
Map showing the location of the fossil mammoth scientists say was killed by hunters.
15 January 2016, 02:05 PM ET
In photos: a microscopic worm can develop one of five specialized mouths best suited to its diet.
15 January 2016, 02:02 PM ET
Depending on a microscopic worm's environment and diet, it can develop one of five specialized mouths best suited to its living situation.
15 January 2016, 12:58 PM ET
Some 130 million years ago, a monster of a reptile, a 30-foot-long crocodile ancestor, once navigated the lagoons of the Tataouine region of southern Tunisia, the area where Star Wars' Tatooine was filmed.
15 January 2016, 12:15 PM ET
Here's a look at the 130-million-year-old remains of a monster-size crocodile ancestor and excavation at the site where Star Wars' Tatooine was filmed.
15 January 2016, 08:32 AM ET
A caloric increase is helping the oldest known living terrestrial animal in the world — a giant tortoise living on the tiny Atlantic island of Saint Helena — reclaim his health and vigor, a veterinarian reports.
15 January 2016, 07:57 AM ET
Modern-day felines may be the ultimate mutts. Turns out, the ancestors of modern-day cats, from lynxes to the domestic Fluffy, interbred across species at many points in history, a new analysis of the feline family tree suggests.
14 January 2016, 07:33 PM ET
Three venomous sea snakes have washed ashore hundreds of miles from their normal home range. Though El Nino may be to blame for their odd appearances, scientists are puzzled over why they are stranding.
14 January 2016, 05:00 PM ET
An incredibly long-necked dinosaur, with leg bones the size of couches, is so massive that it has invaded not one, but two rooms at the American Museum of Natural History in New York City.
14 January 2016, 04:59 PM ET
The cast of an enormous titanosaur skeleton will go on display at the American Museum of Natural History in New York City on Friday.
14 January 2016, 02:47 PM ET
The future is looking brighter for manatees — the gentle, roly-poly marine mammals once mistaken by sailors for mythic mermaids.
13 January 2016, 02:05 PM ET
A recent study of the Brazilian torrent frog, Hylodes japi, shows that the species employs a more nuanced communication system than any other known frog species.
13 January 2016, 10:27 AM ET
Being orphaned as a baby may have a bigger impact on chimpanzees than was previously thought, a new study finds.
13 January 2016, 08:02 AM ET
Giraffes are tall creatures, but they're not as large as their extinct relatives, Sivatherium giganteum, a new study finds.
12 January 2016, 02:49 PM ET
Frogs of the genus Hylodes squeal, inflate vocal sacs, wave their arms and wiggle their feet and toes while courting their mates or warning their rivals.
12 January 2016, 12:24 PM ET
Shimmering against a background of deepest black, an image of a rarely seen larval cusk-eel earned the top prize in the Underwater Photography Guide's 2015 Ocean Art Contest.
12 January 2016, 11:43 AM ET
Why did the chicken cross the road? Opinions vary, but new evidence suggests that she likely picked up a few hitchhikers along the way.
12 January 2016, 11:40 AM ET
During the Ediacaran period, about 635 million to 541 million years ago, oxygen was sparse, the oceans were murky and marine organisms ate by absorbing nutrients floating around in the water.
12 January 2016, 09:38 AM ET
A hunter recently crossed paths with a rare cat: a mountain lion with extra teeth and white whiskers on the top of its head, the Idaho Department of Fish and Game reported.
11 January 2016, 04:04 PM ET
An (adorable) new technique proves that insects can use stereopsis to see in 3D.
11 January 2016, 08:18 AM ET
The biggest ape to ever walk the Earth, Gigantopithecus blacki, may have died out because of its big size and limited diet, new research suggests.
11 January 2016, 08:16 AM ET
Behemoth whales whose tails are often seen in large numbers slapping the water off Hawaii during the winters have been slow in reaching the Aloha State. Some onlookers had labeled the Hawaii humpbacks as "missing."
08 January 2016, 09:39 PM ET
Anacondas are found in tropical South America. They are among the largest snakes in the world and are known for their swimming ability.
08 January 2016, 12:20 PM ET
During the age of the dinosaurs, three tiny mantises became engulfed in glops of sticky amber and stayed there, preserved, until researchers discovered the entombed critters millions of years later.
07 January 2016, 10:34 AM ET
Meat-eating theropod dinosaurs used fancy footwork to attract mates, new evidence suggests.
06 January 2016, 05:11 PM ET
By sticking close to a crow that was killed, other crows improve their chances of learning about predator species they need to avoid.
06 January 2016, 04:41 PM ET
Group living helps elephants with the difficult decisions that they make on a regular basis – how are these bonds affected by poaching?
06 January 2016, 03:00 PM ET
Sharks may use their keen sense of smell to navigate the vast ocean, a new study finds.
06 January 2016, 02:59 PM ET
Leopard sharks may use smell to help them navigate the ocean, a new study finds.
06 January 2016, 11:35 AM ET
Scientists have discovered a shark nursery off New York where baby sand tiger sharks migrate in order to eat and grow. See photos of the little sharks, ranging in age from several months to 5 years.